Manley Ford 427 (Medium/Hi Riser/Tunnel Port) 1.750 Dia Dish Severe Duty Exhaust Valves (Set of 8) 1975-cadillac-fleetwood-esi7559372 A take no prisoners place

A take no prisoners place where power

while decreasing EGT

A supplied gasket provides a perfect seal

Year Make Model Submodel 1993-1997 Yamaha RT180 Base 1999-2003 Yamaha TTR225 Base 2005-2009

reinforced drive straps

Manley Ford 427 (Medium/Hi Riser/Tunnel Port) 1.750 Dia Dish Severe Duty Exhaust Valves (Set of 8) 1975-cadillac-fleetwood-esi7559372 A take no prisoners placeManley Severe Duty Valves deliver the ultimate in strength, reliability, and high performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH 428 for exhaust and NK 844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400F, Manley exhaust valves endured 100 million cycles, while competitors failed after just